# Java - Math nextAfter() Method

The Java Math nextAfter() method returns the floating-point number adjacent to the first argument in the direction of the second argument. If both arguments compare as equal a value equivalent to the second argument is returned. In special cases it returns the following:

• If either argument is a NaN, then NaN is returned.
• If both arguments are signed zeros, a value equivalent to direction is returned.
• If start is infinite and direction has a value such that the result should have a smaller magnitude, Double.MAX_VALUE or Float.MAX_VALUE with the same sign as start is returned.
• If start is ±Double.MIN_VALUE or ±Float.MIN_VALUE and direction has a value such that the result should have a smaller magnitude, then a zero with the same sign as start is returned.
• If start is equal to ±Double.MAX_VALUE or ±Float.MAX_VALUE and direction has a value such that the result should have a larger magnitude, an infinity with same sign as start is returned.

### Syntax

```public static double nextAfter(double start, double direction)
public static float nextAfter(float start, double direction)
```

### Parameters

 `start` Specify starting floating-point value. `direction` Specify value for direction.

### Return Value

Returns the floating-point number adjacent to the first argument in the direction of the second argument.

NA.

### Example:

In the example below, nextAfter() method returns the floating-point number adjacent to the first argument in the direction of the second argument.

```public class MyClass {
public static void main(String[] args) {
System.out.println(Math.nextAfter(2.55, 4));
System.out.println(Math.nextAfter(10.1, 3));
}
}
```

The output of the above code will be:

```2.5500000000000003
10.099999999999998
```

❮ Java Math Methods

5